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Finding the Fourth Proportional to 262,909.68, 394,281 and 85,375.68

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Solution

The fourth proportional to 262,909.68, 394,281 and 85,375.68 is: 128,036.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,909.68 : 394,281 = 85,375.68 : x
  2. Step 2: Convert to fraction form
    262,909.68/394,281 = 85,375.68/x
  3. Step 3: Cross multiply
    262,909.68x = 394,281 × 85,375.68
  4. Step 4: Simplify right side
    262,909.68x = 33,662,008,486.08
  5. Step 5: Solve for x
    x = 33,662,008,486.08/262,909.68
  6. Step 6: Final answer
    x = 128,036.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.